Metro

Dzhokhar Tsarnaev, Azamat Tazhayakov at UMass-Dartmouth

Three short videos of Dzhokhar Tsarnaev entering and exiting a UMass-Dartmouth gym only a day after the Boston Marathon bombings. They were played to jurors Monday in the obstruction-of-justice trial of Azamat Tazhayakov, who is with Tsarnaev that night in the gym. The video is taken around 9 p.m. on April 16th.